Editing Urashima Tarō (section)

===Relative dates===
As for the relative dating of these texts, an argument has been advanced that places the ''Fudoki'' version as the oldest.{{Refn|group="lower-alpha"|By proponents such as {{illm|Akihisa Shigematsu |ja|重松明久}} (p. 107) and Yū Mizuno 1:63, cited by McKeon.}} The argument dates the ''Tango fudoki'' to shortly after 715, but the compilers refer to an earlier record by {{illm|Iyobe no Umakai|ja|伊預部馬養}}, which was identical in content.{{sfnp|McKeon|1996|pp=7–8}}<ref name=shigematsu-oldest /><ref name=mizuno-oldest /> It has even been suggested by [[Shūichi Katō (critic)|Shūichi Katō]] that this Umakai originally adapted this tale into Japanese from a similar Chinese tale.<ref name=kato />